Pop the bubbles by tapping them (they will make a pop sound:). They reappear by themselves, so you can play on iPads or phones. It is a good stress relief game! Also, be careful. The blue bubbles up you score, but the greenish ones RESET your score! Also it will save your score in case you must leave the scratch website for a while. :)
So I was just bored so I started a random project and played the pop sound. It made me think of bubbles so I made this.